Terry-pile-fabric loom



Aug. 10 1926.

A. J. CHEVRETTE TERRY FILE FABRIC LOOK Filed Dec. 30,

Patented Aug. 10, 1926.

UNITED STATES PATENT OFFICE.

AUGUSTIN J. CHEVRETTE, OF WORCESTER, MASSACHUSETTS, ASSIGNQR TO CROMPTON & KNOWLES LGOM \VORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TERRY-PILE-FABRIC LOOM.

Application filed December 30, 1924] Serial No. 758,920.

My present invention relates to improvements in terry pile fabric looms and it is the general object of my invention to form terry piles by means which give the cloth a positive back and forth motion with respect to the forward position of a lay moving through a fixed range of action.

My invention relates more particularly to that type of loom wherein very high pile is produced and wherein the formation of terry is accomplished by moving the fell of the cloth rearwardly toward the loom reed periodically on the pile forming pick after which the fell is moved forwardly again to permit the laying of the picks .which form the pile.

Another object of my invention is to provide adjustable means for forming pile of varying heights whereinv the means are actuated positively in both directions for all adjustments.

It is a further object of my invention to provide a positive lock for holding the cloth in rearward position at the time a heading is being woven. 7

With these and other objects in view which will appear as the description proceeds, my invention resides in the combina tion and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown two forms of my invention,

Fig. 1 is a side elevation of a loom having my invention applied thereto,

Fig. 2 is a detailed horizontal section on line 22 of Fig. 1,

Figs. 3, 4, 5, and 6 are diagrammatic views showing the successive positions of the cloth and lay during a complete cycle,

Fig. 7 is a detail elevation of the cam by means of which the fell of the cloth is moved postively in both directions, and

Fig. 8 is an enlarged end view of the rear whip rolls shown in Fig. 1. I

My present invention relates more particular y to improvements in the devices for moving the cloth and comprises a loom frame 10 having a rocker shaft 11 upon which is pivotally mounted alay 12 actuated by a suitably'driven connector 13. The lay is pro-videdwith a fixed reed 14 which moves backand forth in a fixed range of j Figs. 7 and 8 and comprises a plate 43 from action. The loom is provided with a lower ground warp beam 15 and an upper terry cross girts 31 of the loom.

warp beam 16 which are suitably mounted to deliver warp in the required amounts. Ground warp W is lead upwardly from the beam 15 over a whip roll 17, forwardly to a guide bar 18, and downwardly tothe takelower end of the lever 26 .is connected to a rearwardly extending link 27 by means of which said lever is rocked.

The connectors 24 and 27 are pivotally attached as at 28 to an upstanding lever 29 loose .on a shaft 30 supported on one of the Said lever 29 has formed thereon upper and lower arms 32 and 33, respectively, which are spaced sufiiciently to receive therebetween a lug 34 extending laterally from a lever also loosely mounted on said shaft 30. Upper and lower set screws 32 and 33 respectively, engage opposite sides of the lug 34 to cause said lever 29 to move when the lever 35 is actuated.

The rear end of arm 35 has rotatably mounted thereon a roll 36 which is positioned for engagement with a cam 37 normally rotating in the direction of arrow A, Fig. 1, and secured to stub shaft 38 which rotates in fixed bearings 39. Said shaft 38 has secured thereto a gear 40 which meshes with the gear 41 secured to the bottom shaft 42 of the loom, said gears 40 and 41 being of any desired ratio to produce the type of fabric desired. As shown herein the gears are so proportioned as toproduce one rctation of shaft. 38 for every rotation and a half of shaft 42, the shaft 42 receiving one rotation for every two picks of the loom, so that said shaft 38 makes a complete revolution every three picks. If so-called fourpick terry is desired the gears '40 and 41 can be chosen of such proportion as to make stub shaft 38 rotate twice as fast as the bottom shaft 42.

The cam 37 is shown more particula'rly in which projects an inner cam'faoe 44 and a lever 47 is raised.

flange 4:5. The flange extends only part way around the cam and defines with the inner surface 44 a track 46 proportioned to receive the roll 36. The distance from the shaft 38 to the highest part of the face 44 is greater than the distance from said shaft to any part of the flange 45 to permit the roll 36 to remain in raised position without being engaged by the cam 37 as the latter rotates.

For controlling the position of lever 29 I associate with the usual pattern mechanism a lever 'ipivot-ed as at A8 to a fixed support and cooperating with a pattern chain 49. A lock pivoted as at 51 to some fixed part of the frame a notch 52 which cooperates with a boss 53 on the lever 29 and serves to hold said lever 29 in forward position when the pattern lever 47 is down butreleases said lever 29 when the A spring 54: interposed between lever .26; and a fixed part ofthe loom frame tends normally to move the lever 52 rearwar-dly against the lock 50 and a spring 55 interposed between arm 32 and lever serves to hold the lug 34 against the stop screw 32 The full lines in Fig. 1 show the parts as they will be placed when weaving a heading between sections of terry fabric. In this position the lock 50 holds the lever 29 in forward position against the action of spring 5 1 to hold the guide, bar 18 and whip roll 17 in rear position with the fell of the cloth so placed as to beengaged by the reed when the lay is in its forward position. In this position the lever 35 and roll 36 will be held in raised position. As the wea ing of the heading is finished a ball 56 on pattern chain 49 will be moved under the lever 47 to raise the same to the dotted line position and at the same time the highest part of face 44 will raise roll 36 slightly to relieve the pressure between boss 53 and lock 50. Lever 47 will raise link 57 connected to lock 50 to lift the latter out of the path of boss 53. Lever t? will remain in raised position so long as terry fabric is being woven, this result being accomplished either by stopping the pattern chain 49 or by providing the same with a plurality of rolls 56, the method of holding the lever 49 in raised position forming no part of the present invention and being Well understood in the art.

As long as lock 50 is raised spring, 54 will act to hold roll 36 against. cam face l t. As the shaft 38 continues to rotate the roll 36 will move down along face 44 and pass into the track 46, being moved positively to the lowest part of the cam face 414tand requiring cam 29 to move rearwardly to the same position every third pick resulting in the forward movement of the guide bar 18 to the same position while the terry forming picks are being laid. As shaft 38 continues to rotate and the roll 36 moves out of the trac: said roll will be raised positively by the face la to move the guide bar 13 rearwardly to'pile forming position.

I the length of pile is to be changed the screw 33 may be altered so that more or less lost motion may ist between said screw and the lug 34;, the lever 35 always receiving enough motionto form the maximum height of pile.

In Figs. 3 to 6 inclusive 1 have shown the manner in which the pile is formed. vll ith the roll 18 in forward position the fell. of the clothF will be forward and the shuttle willlay pick offilling P some distance to the rear of the fell of the cloth F as shown in Fig. 3. A second pick is then laid as shown in Fig. l, and then a third pick P is laid as in Fig. 5. On the beat of the lay corresponding to pick P the roll 36. will moved to itshighest position by the cam face 44: thus carrying the fell of the fabric F to the rear position shown in .6 to cause looping of the pile warp YVPintervcning between the fabric and the pick P.

The pile warp W from the beam 17 moves forwardly with the ground warp by means of a roll 58, slidably mounted in an arm 59 and held rearwardly in said arm by means of spring 60 guided by a rod 61 in the arm Said arm 59 is pivot-ally mounted as at 62 to another arm 63 secured to the shaft 17, By means of this construction the pile warp is moved back and forth at the same time that the ground warp is moved.

It is necessary to return the guide bar 18 to the same forward position in order to insure a uniform height of pile. Should said bar movev var ing distances from its rear position there would be a corresponding variation in the height of the pile and a consequent wavy appearance of the finished cloth. The structure set forth herein provides for returning the cloth to the same forward pcsitionand will therefore producea fabric free from wavy and irregular rows of pile loops. i

From the foregoing it will be seen that I have provided means for moving the fabric positively in both directions toward and from terry pile forming position and that the lay and the reed carried thereby may be moved through a fixed range of action to permit the same to be of the substantif-il con struction necessary when weaving high pile. Also, it will be seen that when the loom is weaving, a heading the lockv 50 will serve to hold the fell. of the cloth positively in rearward position and that the position of the said lock with respect to the boss 53 may be adjusted by means of screw 32*. Furthermore it'wifl be seen that'by adjustment of screw, 33*. the height of; the pile maybe varied, spring 55 serving normally to hold the lug 34 against the screw 32' to prevent undue vibration. It will be further noted that the boss 53 and lock remain unchanged when the parts are given a dilferent setting to vary the height of the pile and the boss is moved slightly away from the lock to permit the latter to be raised eas ily by the pattern lever 47.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: i

1. In a terry pile fabric loom having a lay moving through a fixed range of action, a cam, a cam lever, said cam having a grooved portion to actuate the lever positively during a portion of the rotation of the cam and having also a portion to move the lever positively in one direction only, means to hold the lever in raised position when the same is in position to be actuated by the second mentioned portion of the cam, and connections between said lever and the fabric to move the latter toward and from pile forming position.

2. In a terry pile fabric loom having a lay moving through a fixed range of action, a cam lever, a cam having a surface to actuate the cam lever, a portion of said surface effective to actuate said cam lever positivly in two directions and another portion of said cam effective to actuate the lever positively in one direction only, means to hold the lever in position out of the path of the first named portion of the cam, and means between said lever and the fabric to move the latter toward and from pile forming position.

3. In a terry pile fabric loom having a lay moving through a fixed range of action, a lever, connections between the lever andthe fabric to move the latter toward and from pile forming position as the lever is moved, a cam to cooperate with the lever, said cam being formed in part as a track cam and in part as a face cam, the face cam being proportioned to move the lever to a position to clear the track portion of the cam, and means to hold said lever in raised position.

4. In a terry pile fabric loom having a lay moving through a fixed range of action, means to support the cloth for movement toward and from the lay, pattern mechanism, locking means to hold said supporting means in fixed position when a heading is being woven, mechanism to give said means a slight motion away from the look at periodic intervals, connections from the pattern mechanism to move said locking means to unlocking position when said supporting means is moved slightly away from the lock.

5. In a terry pile fabric loom having a lay moving through a fixed range of action, means to support the fabric, a driving lever having a fixed amplitude of motion, a driven lever operatively connected to said supporting means, a lock for said driven lever, adjustable connections between the levers to vary the position of the driven lever with respect to the lock and moving said driven lever positively in one direction, and adjustable connections between said levers to vary the extent of motion of the driven lever and moving the latter positively in the opposite direction.

(3. In a terry pile fabric loom having a lay, a regularly moving driving member, a driven member, means operatively connected to the driven member to move the fabric relatively to the lay, connecting means between the members etfective to cause positive movement of the driven member by the driving member in opposite directions by a portion of the driving member, said connecting means being effective to cause positive motion of the driven member in one direction only by another portion of said driving member.

7. In a terry pile fabric loom having a lay, a regularly moving driving member, a driven member, means operatively connected to the driven member to move the fabric relatively to the lay, connecting means between the members effective to cause positive movement of the driven member by the driving member in opposite directions by a portion of the driving member, said connecting means being effective to cause positive motion of the driven member in one direction only by another portion of said driving member, and means to lock the driven memher when the same is operatively disposed with respect to the latter named portion of the driving member.

In testimony whereof I have hereunto affixed my signature.

I AUGUSTIN J. CI-IEVRETTE. 

